CB750 restoration time lapse

The design definitely accepts a paper filter inside.

However, it is possible the owner used a stainless steel re-usable oil filter that is simply rinsed (with mineral spirits) and blown dry and put back? My ol' Aprilia had a stainless steel filter cartridge in behind a spin-on cover.
 
Here's the correct OE finned oil filter enclosure. It's what I would have expected to see on this bike, especially considering the degree of restoration it went through. But again, it's possible I mistakenly saw something else because of the speed of the video.

706d5c1932f12809c4cc5479007118cf.jpg
 
No, LR, you’re right. The filter enclosure was smooth and polished.
 
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